<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<link rel="stylesheet" href="css/responsive.css" />
		<title>响应式设计学习</title>
	</head>
	<body>
		<div id="div1"></div>
		<div id="div2"></div>
		<div id="div3"></div>
	</body>
</html>
